Last-finishing machine



G, CLAUSING.

' LAST FINISHING MACHINE.

APPLICATION FILED DEC. I. 1919.

Patented 001: W, I922 4 SHEETS-SHEEI1 G. CLAUSING.

.LAST FINISHING MACHINE.

APPLICATION FILED 050.1,1919.

Patented Oct 11.0, 19223.,

4 SHEETS--SHEE1 2.

I W I gwuawtoz 35% af/iiozmm p '& v f

Patentefl Oct. W, 1922.

4 HEEIS-SHEEI d,

G. CLAUSING.

LAST FINISHING MACHINE.

APPLICATION FILED DEC. 1 1919.

G. CLAUSING.

LAST FINISHING MACHINE. APPLICATION m n mac, 1. 1919.

Pimnted Oct. III), 1922..

LIASLM 4 SHEEIS-SIIEET 4.

GEORGE CLAUSING, OF PORTSMOUTH,OI-IIO, ASSIGNOR WILLIAM J. BURKE AND HENRY CLAUSING, BOTH OF PORTSMOUTH, OHIO.

LAST-FINISHING MACHINE.

fipplication filed December 1,1919. Serial No. 341,683.

To aZZ whom/it may concern Be it known that I, Gnonon GLAUsINo, a citizen of the United States, and a resident of the city of Portsmouth, in the county of Scioto and State of Ohio, have invented cer tain new and useful Improvements in Last- Finishing Machines, of which the following is a specification. i

This invention relates to a machine for finishing the toes of lasts immediately after turning, whereby the finishing of lasts may be accomplished efficiently and accurately as distinguished from the hand methodsnow employed. y y

1n the manufacture of lasts as ordinarily n'acticed, theturning down of the last is performed in a lathe leaving a knob on the toe of the last for the purpose of holding the last in the lathe. The knob is then sawed oil and the bottom of the last trued upon a wheel. A paper pattern is then laid on thebottom of the last, and the toe or shape of the toeis marked along the edge of this pattern. The workman then places the last in a jack and files the surplus wood off and also files the toe into shape as nearly as possible. The accuracy of this work depends entirely upon the skill and eye of the workman. I i

In the present device, however, the removal of the knob from the toe of the last and the finishing up of the toe is done by machine, thus ensuring that all lasts made from the master or model last will be accurately finished and exact duplicates of the model last. )f c'ourse the time required to perform this work in the present device will be very much shortened as compared with the old hand method outlined above.

Briefly, my device comprises a machine adapted to receive at one end a model last, that is to say a last which is to be duplicated and the toe of which has been finished off,

while the other end of the machine is adapted to receive. a last to be finished. These two lasts are receivedby suitable holding devices provided for that purpose and connected to each other in such a manner that n iovement of one last, or one holding device, is exactly duplicated in the other. In one form of my invention the last to be finished is actuated by a hand wheel, and in another form illustrated this is done by any suitable power, the principle of operation, however, being the same in both instances.

The carriages or holding devices for holding both lasts in place are suspended from a suitable shaft or rod, with the toe of the model last directed toward a guide roller mounted in a suitable fixed bearing therefor,

the toe of the last to be finished being 'dlrected toward a cutter by which the too is finished off. These carriages are adapted to be swung about their supporting shaft so that endwise movement may be imparted simultaneously to both lasts. The carriages are adapted also to be actuated either by power or manually to impart a rotary movement to both lasts, the carriages being so connected as to constrain the motionof the model last to be absolutely diilplicated in the last to he finished. in order that the movement of the carriages in a direction to carry the lasts toward the guide roller and toward the knife may be limited, stop mechanism has been provided. I have also pro vided a support for the heelof each last and for the toe of each last, whereby lasts of any size may be taken care of in a single machine. i

Referring .now to the drawings,

Fig. 1 is a sectional, elevational view of our machine taken at the operating side thereof; p

Fig. 2 shows our machine in plan;

Fig. 8 is a section taken on the line of Fig. 1 looking in the direction of the arrows;

Fig. 4 is a View of the connecting means used in connecting one last holding mech anism to the other and constraining both lasts to be given a rotary motionsiniuL taneously; i Fig. 5 is an enlarged view of the heel-holdmg means;

Fig. 6 is an enlarged view of the toeholding means; and

Figs. 7 and 8 areviewsshowing a drive for our machine whereby manual operation is dispensed with.

Referring to the drawings in detail, 1 designates shaft extending longitudinally of the machine and carrying a pair of hangers 2 and 3 which in turn support the entiremechanism of the machine, with the exception of the model roller 41- and the knife or cutter 5, the roller 4 being mounted in a fixed hearing 6 while the cutter 5 is mounted for rotation in a bearing 7, and is accompanying v belt and pulley 8 and 9 respectively.

The lower ends of the hangers 2 and 3 are connected to each other by a shaft 10 whereby movement of one hanger is positively imparted to the other. Extending longitudinally of the machine and just above the rod 10 is a rod 11.

Referring now to the holding devices for the model last and the last to be finished these devices co 'nprisev carriages or cradles at each end of the shaft 11, the carriage for the last to be finished being designated 12. Inasmuch as the carriages are duplicates of each other, one only will be described.

Referring now to Figs. 1, 2 and 8', the

carriage12 as viewed in Fig. 3 is rectangular in form, one end of the same receiving astud 13 about which the carriage is movable and on which stud is rigidly mounted a hand wheel 14]. used in operating the machine, as will be described in detail later on. The opposite end of the cradle or carriage 12 has a tapered hole designated 15, provided for the purpose of receiving a ring 16,

the periphery of which is tapered also, this ring being secured to and earned by a carriage 17. The center line of the stud 13 is in line with the centers of the hole 15 and .ring 16. one end of the carriage 17 receives the stud 13, already mentioned, and is rigidly secured thereto by means of nuts 18 and 19, so that any rotary movement of the wheel 14: will impart a similar movement to the carriage 17. Carried by the carriage 17 is a plate 20 having transverse slots 21 formed therein cooperating witha spring pressed plunger 22, this spring-pressed plunger, in turn, being connected to a heelreceiving member 23. The heel-receiving member comprises also a vertically adjustable screw 24 on which the last may rest. It will be seen, therefore, that so far as the heel-receiving member is concerned, the same may be adjusted both vertically and longitudinally of the carriage 17 to take care of lasts of any size, for by raisingthe plunger 22 out of engagement with the slots 21 in the plate 20 the heel-receiving member may be moved longitudinally of the plate 20 while by screwing the member 2 1 in or out the heel may be lowered or raised. The toe of the last received by the ring 16 and toe-clamping members 25,the latter being adjustable. transversely by means of a screw-threaded member 26, so as to accommodate. this holding device to lasts of various widths. The last is held in position also by means of a strap 27 passing over the front of the same at about the instep of the last, this strap being pulled downwardly into position to hold the last firmly in position by means ot a lever 28, pivoted at 29 to any convenient part of the carriage 17 this lever, after being adjusted, being held in such position by means of pawl 30 and rack 31.

From the description thus far given, it will be apparent that the carriage t2 and the carriage 17 are movable as a unit to the left or right, as the case may be, as viewed in Fig. 3 about the shaft 1 to cause the last indicated in dotted lines and designated 32 to be moved longitudinally either way, from or toward the knife 5. It will also be apparent that the carriage 17 may be given rotary movement about the center line of the stud 18 by simply rotating the hand whccl 1/1, to cause the last 32 to be rotated. lt therefore follows that the last may be given a rotary movement with respect to its longitudinal axis and with respect to the lollgitudinal axis of the carriage, and at the same time be given a longitiulimil. nmvement.

The carriages 33 and H, provided for the purpose of receiving the model last, dcsignated 35, are, as already noted, di'1|')licatcs of the carriages 12 and '17 and a detailed dcscription of the same. will, thcrctorc not be necessary. llowever. in order that movement of the model last 35 may be exactly duplicated in the last to be linished 32, connecting means which will now be dcscrilicih have been provided for connecting the carriages 1'7 and 12 to the ".arriagcs 33 and 34. These connecting means con'iprisc cranks 3(3 and 37, the crank 36 being mounted upon the stud carrying the hand wheel 14-, and the crank 37 being connected to a stud rigidly secured to the carriage 33. These cranks are connected to each other by a connecting rod 38. At the outer ends of the cranks 3G and 37 I have provided additional cranks 39 and ett), respectively, connected to each other by the connecting rod 4-1. From this constructionit will be seen that movement of the handwhccl H to more the carriages 12 and 17 will. through the i'ucdiuui of the cranks and connecting rods just incutioncd, impart an exact duplicate movement to the carriages 2-33 and Zlet. l urthcruioic. it will be noticed that it is not possible to have a dead-center position, inasmuch as, should the'parts be in the position for example shown in Fig. 1 wherein the cranks 36 and 37 are in alin'ement, the cranks 39 and 10 are still off center and. therefore, a continued movement of the wheel 14 will cause a movement of the carriages 53 and 14 in the same direction and to the same degree.

Too much emphasis cannot be placed on this feature of my invention, inasmuch as in a machine of this character wherein a last is being finished to an exact duplicate of a model last, it is absolutely necessary that all movements of the model last be imparted to the last being finished.

Before coming to a detailed description lit) 3 Twill describe the operation. of

menses of the mechanism illustrated in Figs. .7 and the apparatus as so far outlined. I

The last 32 is placed in position on the carriages 12 and 17, and the last 35 is placed in position on the carriages and 34, the heel-supporting members 23 and toe-receiving devices 25 being adjusted to receive the same, after which the levers 28 arepulled down to causethe straps 27 to draw snugly around the upper part of the lasts about the instep thereof and the pawls 3O moved into position to engage theteeth of the racks 31. The carriages 12 and 1'? and the carriages 33 and 34 are then given a swinging movement about the shaft 1 to cause the last32 to'movle toward the cutter 5 and the model last 35 to move toward the model wheel 4, stop mechanism 44 being provided for the purpose of limiting this movementso that the forward ends of the carriages may not engage the knife and the roller. it spring 43, secured to the shaft 1. and a bar 43" secured to the carriages 12 and :17 and the carriages and 34, (see Figs. 2 and 3) is provided for the purpose of urging the last 35 into engagement with the face of the roller 4. The knife 5 now 30. the hand wheel 14' maybe rotated either to begins to function to remove the knob 42 on thetoe of the last 32, and at this same time the right or left, as desired, to impart a rotary movement to both lasts to cause the toe of the last 32 to be cut away toconform to the finished toe of the model last 35. By reason of the cranks 36 and 37 and 39and 40, and the connecting rods 38 and41, any rotary movement of the last 32 is imparted to the last 35, or vice versa. This compound movement,--that is to say, a longitudinal and a rotary movement of the last,- is continued until the knob 42 is completely cut away and the toe of the last 32 finished to correspond with that of the last 35.

Themodel last and the last to be finished may then be turned over in their respective carriages andstrapped down as before, after which the bottom of the model last may be brought into engagement with the roller 4 and the bottom of the last 32 to be finished brought into engagement with the knife 5.

Then by a longitudinal movement of the last, or a combined rotary and longitudinal movement, the bottom of the last may be finished off to correspond with that of the last 35.

Referring nowto the disclosures of Figs 7 and 8, it will be seen that the "hand wheel 14 has been replaced by a gear 45, this gear being mounted upon the stud 13 and carrying the cranks 36 and 39. Meshing with the gear 45 is a pinion 46, mounted on a shaft 47, carrying at its inner end, viewed in F 8, a bevel gear 48. This bevel gear is in mesh with a bevel gear 49 finished, the :heelfor example, by merely on stud shaft 50, carrying a pulley 51, this pulley in i turn carrying a belt 52, which passes over a pulley 53, the latter being driven from any suitable source of power, heredesignated 54. a y

From this it will be seen that a rotary motion may be imparted to the carriages 12 and 17 and 33 and 34 from a line shaft or other suitable source of power.

In order that the carriages 12 and i7 and 33 and 34 may be given a movement to causethe lasts 32 and 35 to move longitudi nally, I have provided a segmental gear and worm 56 meshing therewith, the latter being mounted upon a shaft 57 adapted, through the medium of clutch mechanism 58,,to be thrown into driving engagement with a shaft 59, driven from any suitable source of power. i

From the foregoing-it will be seen that I have provided a machine for finishing lasts whereby the contour of the model last will be exactly duplicated in the last being finished. It will be understood that in lin ishing lasts of certain style various sizes of this style of last may befinished without changing the model last, it merely being necessary to adjust the toe and heel holding devices. It is to be understood also that arts other than the toe of the last may be turning the lastsrend for end. I

It will be obvious from the foregoing description that any number of lasts may be finished simultaneously by merely providing additional carriages for receiving the lasts to be finished and connecting them to the hand wheel 14 by a connection similar to the cranks and connecting rods used to connect the wheel 14 to the model last carriage, which have already been described.

It is to be understood that I am not to be limited to the precise details of construction illustrated and described as obviously various changes may be made therein within the purview of the present inventhm.

What Iclaim as new is:

1. In a last finishing machine, a pair of spaced hangers, a rod attached to said hangers, a carriage on said rod, the ends of said carriage being upturned. with respect to the bottom of the carriage, a stud passing freely through one of said ends, the other end of said carriage being provided with a tapered bore the center of which is in line with the longitudinal axis of said stud, a

last receiving carriage above the first-mentioned carriage, one end of the last-mentioned carriage being upturned, said stud passing therethrough and secured thereto,

. the opposite end being provided with a tapered last-receiving ring fitting into and concentric with the tapered bore in the firstmentioned carriage.

2. In a last finishing machine, a pair of spaced hangers, a rod attached to said l'ran'gers, a carriage on said rod the ends of said carriage being upturned with respect to the bottom thereof, a stud passing freely through one of said ends, means for rotating said stud rigidly secured thereto, the end of said carriage opposite to the stud being provided with a bore the center of which is in line with the longitudinal axis of said stud, a last-receiving carriage above the firstfnamed carriage, one end of the last-mentioned carriage receiving said stud, means for attachin' said stud and the last mentioned carriage rigidly to each other, a collar at the other end of the last-mentioned carriage fitting a bore in the firstrnention'ed carriage, last clamps carried by said collar for engaging a last, heel-receiving means mounted on the last-mentioned carriage, a plunger carried by said heelreceiving means and cooperating with slots in the last-mentioned carriage whereby the heel-receiving means may be adjusted l'ongit'udinally of said carriage and a screw to}: eilecting vertical adjustment of a last.

In a last finishing machine, a pair of spaced hangers, a rod attached thereto, a carriage provided with an ear for receiving said rod, a stud passing through one end of said carriage, a hand wheel rigidly aifixed to said stud, the other end of said carriage being provided with a tapered bore,

the center of which is in alinement with the longitudinal axis of said stud, a lastweeeiw ing carriage, one end of which receives said stud and is rigidly secured thereto, a collar carried by the other end of said carriage and. fitting said tapered bore, a clamp carried by said last-receiving carriage for engaging a last as the same projects through the opening defined by said collar, a slotted plate carried by said last-receiving carriage, heel-adjustin means mounted on said plate, a. spring-pressed plunger co-operating with the slots in said plate for elleeting an adjustment of said heel-receiving means longitudinally of said plate, a screw on which the heel of the last is adapted to rest and forming a part of the heel-receiving means, said screw being adjustable to eil'eet vertical adjustment oi? a last, a lever carried by said last-receiving carriage and pivotally attached thereto, a strap secured to said lever and adapted to clamp a last in position on the lastreceiving carriage, a ratchet supported by said last-receiving carriage and a pawl carried by said lever and vooperating with said ratchet for holding the lever in clamping position to efiect a clamping of the last by said strap on the lastreceiving carriage.

This speei'fi ation signed this 20th day of November, A. D., 1919.

GEORGE CLAUSING.

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